Grease-gun connection



Aug. 31, 1926.

C. G. BUTLER GREASE GUN CONNECTION Filed Sept. l5

l /NVE/Vl v A frog/vins Patented ug. 31, 1926.

' UNITED STA TES PATE

NT OFFICE.

CLYDE G. BUTLER, F DAYTON, OHIU."

GREASE-GUN CONNECTION.

Application led September 15, 1922. Serial No. 588,413.

My invention relates to .lubricating apparatus and in kparticular to grease guns for automotive equipment.

It is the object of my invention to provide a force feed system and apparatus able from the grease gun for cleaning-and adjustment.

It is still a further object to provide wit such an apparatus a locking means for engaging a delivery tube to a grease cup'.

which will accommodate itself `to varying i ltypes of grease cups and oil cups.

`It is `still a further object to provide a rigid 'delivery tube `of su'ch a constructlonv and arranged at such an angle that it` will accommodate itself to the very restricted locations of grease cups andthe like.

It is still an additional object to provide a valve means in the delivery tube for controlling highly .fluid lubricant when making its eXit. y

It is my object to provide a connection between the delivery tube andthe oil cup which will permit of the positive locking of the parts to one another andto prevent the escape of highly fluidlubricant outside of the oil cup during the course of this delivery from' the gun to the cup. v

It is still'a further object to provlde a universal equipment which, may be used both with highly fluid lubricant and lubricant that is either of the character yof hard grease or the like.

Referring to the drawings: e v,

Fig. l isa section of the completeequipiment;

Fig. 2 is a section of the modified of connecting chuck; v 1

Fig. 3 is an elevation of the mechanism shown in Fig. 2; i

"Fig. 4c isa .section on the line 4-4 of Fig. 3. v v

Referring to the drawings, `the numeral 1 designates a lubricantcontaining cylinder form in which isreciprocable a piston head carried by a piston rod 3, threaded exteriorly at 4, which threads are `engaged with the corresponding threads of a `nut 5 having exterior threads engaged with one head 6 of the barrel 1. The piston rod is adapted for rotation by the handle 7 to force lubricant from the area 8. The detailsof construction and of the cylinder kand claims thereon are set forth in my copending application relative to this structure.` vThe cylinder has an end' or cap piece 9 in removable threaded engagement therewith` the said cap lhaving a centrally disposed :tubular` sectionl() interiorly threaded for engagement with the end of a delivery tube 11 iwhich is cxteriorly threaded at its extremity as at 12, and. is

further provided with a circumferential `shoulder as an abutment ,forgengaging a fgasket 16, interposed between the `member It is my object to provide a connection 9 and the shoulder tofobtain Aasealed connection.V

`Thetube 11 yis bent as fat kliatfan angle,

the angle hereinpreferably. being substantially 30 toi facilitate .ther connection of the memberl withy theV grease cups to which Alubricant is to be delivered, ina manner to be described.` 1 .v W v p,

The tube at the oppositeend is threaded as `at15` and ,is further provided with ya circumferentialabutment shoulder` 14 between ,which abutment and the chuck-` is interposed a washer 17..`Upon.the threaded portion 18 is mounted a tubular head orvchuck member 2O having an interior .bore 19in `communication with the bore on -thetube 11. The head 20 `is exteriorly threadedasat 21.for engagement with the corresponding interior ythreads yof a tubular locking member 22 whichmember has an outer `conical portion 23.

cal wall against whichncertain locking `fingers areadapted to lieor abutvwhen the 1n a mannerlto causethe outerends ofthe.'

sameto be thrown outwardlywhen released,

The outermostv portionv of the head isA counter-turned to providea circumferential .seat and a longitudinally` extending cylindritheiraction being similar to that of a hinge.v Each finger is provided with an inturned hook portion 27 adaptedito overhang and extendpartially across the delivery passage of the head when in locking position, and when engaged flatly against the counterturned portion of the head.

The locking member 22 having the cone shaped outer extremity is adapted to circumscribe the fingers and to engage with the outer beveled ends of the fingers to force the same inwardly to locking position.

The .grease cup is represented at 26 and in the first form of the invention is of conical configuration and is ladapted to engage a corresponding conical bore of the head. The grease cup at its junction with its tubular delivery portion forms a shoulder andl the periphery of this shoulder is beveled as at 28 for engagement by the inturned ends of the fingers. In the modification of Figure 2, each finger has a bayonet joint or a hook at its outer extremity, the fingers being shown herein as projecting outwardly and parallel to the grease cup to form a -hook 29 which engages with diametrically related projections 30 carried by the grease cup, the grease cup in this instance having a cylindrical portion the end o f which entube 11 and fixed at its opposite en ters the delivery passage as in the first case and` abuts the gasket 31 ,which is seated against a circumferential shoulder of the chuck bore. This washer 31 prevents egress' of lubricant other than through the deliver passage of the nipple. e

`The washer is spaced away from the outer end of the delivery tube sufliciently to per-- mit the openin of a valve 32 whichis seated against the en of the tube within the chuck bore and the valve is held in seated position by a spring'33 extending throughbthe y a cross pin 34. The function of the valve is to prevent escape of the lubricant when the device is not in use. The sleeve 22 is limited in its movements by a set screw 36. The head may be formed integral with the bent delivery tube. In such an instance, the valve 32 would be positioned substantiall in the manner shown, the bore of the chuck being shouldered to form a seat. The grease cup may be of any desired form either with a conical head as shown in Figure 1, or a c lindrical head as shown in Figures 2, 3 an 4. The locking casing is provided with a knurledv surface 37.

In operating the device the sleeve -is first turned in one direction and fed outwardly during which operation the fingers are thrown outwardly by the spring removing the fingers from their overhanging osition. When in this open position, the c uck or head is brought into enga ment with the grease cup or ,nipple and t e sleeve is then turned inA an opposite direction to force the .locking fingersv conical portion to engagement with the lone extremity intermediately threaded and counter-turned at. the outer extremity to pro vide a seat, locking fingers disposed against sald seat and counter-turnedportion when 1n locking position, said fiingers having inturned extremities adapted to overhang the passage and engage a grease cup for locking. the deliver tube to the cup, an elastic member encirc ing the inner ends of said lingers and yieldably hinging the same, and means engaged with the threads of the head for forcing the fingers to and holding the same in locking position.

2.- In a device of the class described, a fluid delivery tube having a head at one end exteriorly threaded, and counter-turned at one extremity to provide a seat, locking fingers disposed against said seat and counter-turned portion when in locking position, each .finger having an inturned outer extremity adapted to partially extend across the tube'passage when in locking position, to engage a' shoulder of a grease cup to lock the delivery tube thereto, an elastic member encircling said fingers and yieldably hinging the same, and means enga ed with the threads of the head rotatable or forcing the fingers to locking engagements.

3. In a lubricating system, a delivery tube slightly bent medially, and havin its ends exteriorly threaded and shouldere to form abutments spaced inwardly from the ends of the tube an outwardly oplening valve for closing the delivery end of t e tube during a nondelivery period, a head engaged with the delivery end of the tube havin a delivery passage communicating therewit said head counter-turned exteriorl to provide a seat,

yieldaby held at one extremity longitudinally of the head against the counter-turned portion, having hooked ends adapted to extend partially across the delivery passage of the tube, a grease cup engaged within the delivery passa e and shouldered for engagement by said ookedA ico portions adapted to project across the conical delivery passage of the nozzle, 'an elastic member encircling and yieldably hinging and securing said fingers, a receiving nipple adapted to be inserted and sealingly fitted within the delivery passage of the nozzle and having a shoulder engageable by said fingers for locking the nozzle to the nipple, and

15 livery elementterminally counter-turned to orm a seat and having a plurality of locking fingers arranged around the counterturned portion and abutting the seat at one end, parallel with the axis of the element, said fingers yieldably hingedly held at their inner ends against the counter-turned portion and adapted to swing outwardly, and having their outer ends adapted for locking engagement with the receiving element,

for preventing withdrawal of either element,

and means translatable upon the delivery 'element for forcing the ingers to and holdinfr the same in locking position.

n testimony whereof I affix my signature. CLYDE G. BUTLER, 

